Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-08664-6
Keywords
-
Categories
Funding
- Swiss National Science Foundation [BSSGI0_155873, 200021-169061]
- SINERGIA network Mott Physics Beyond the Heisenberg Model
- Swiss National Science Foundation through its Sinergia network Mott Physics Beyond the Heisenberg Model MPBH [CRSII2_160765/1]
- NCCR MARVEL [51NF40_141828]
- Air Force Office of Scientific Research [FA9550-09-1-0583]
- Danish Center for Synchrotron and Neutron Science
- Air Force Office of Scientific Research grant [FA9550-15-1-0474]
- Swiss National Science Foundation (SNF) [51NF40_141828, BSSGI0_155873] Funding Source: Swiss National Science Foundation (SNF)
Ask authors/readers for more resources
The transition temperature T-c of unconventional superconductivity is often tunable. For a monolayer of FeSe, for example, the sweet spot is uniquely bound to titanium-oxide substrates. By contrast for La2-xSrxCuO4 thin films, such substrates are sub-optimal and the highest T-c is instead obtained using LaSrAlO4. An outstanding challenge is thus to understand the optimal conditions for superconductivity in thin films: which microscopic parameters drive the change in T-c and how can we tune them? Here we demonstrate, by a combination of x-ray absorption and resonant inelastic x-ray scattering spectroscopy, how the Coulomb and magnetic-exchange interaction of La2CuO4 thin films can be enhanced by compressive strain. Our experiments and theoretical calculations establish that the substrate producing the largest T-c under doping also generates the largest nearest neighbour hopping integral, Coulomb and magnetic-exchange interaction. We hence suggest optimising the parent Mott state as a strategy for enhancing the superconducting transition temperature in cuprates.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available